Mechanics work on ball turret of USAAF B-29 Superfortress aircraft parked at Smoky Hill Air Force Base in Kansas,United States.

USAAF B-29 Superfortress units at the Smoky Hill Air Force Base in Kansas,United States. Mechanics work on the ball turret on United States Army Air Forces (USAAF) B-29 Superfortress heavy bomber aircraft parked at the Smoky Hill Air Force Base. A mechanic works on gun turret. B-29s parked across airbase.